Regarding the overheating servo, it probably can't move through its full range of motion due to the linkage. So at one end of its travel the servo is constantly stalled, which will quickly heat it up. The solution is to program the servo end points on the transmitter.

I wouldn't be too worried about the counterweight, it shouldn't get hit, and it's going slower anyway. The bits that look marginal to me are between the central hub and the edge of the bar, particularly by that mounting hole, and along the threaded holes that the tooth screws into. Polycarb is a gre...

As Mark suggested, unlike most batteries they don't contain anything toxic, so the way to dispose of a dodgy lipo is to fully discharge it, and then simply put it in the bin. Leaving the lipo in a bucket of salt water for a couple of days is a good method of discharging as it should contain any fire...

To be honest the braking isn't a major issue, but having previously only used braked escs I really noticed a slight sloppiness in the control of the robot when I did briefly test a dasmikro, almost as if you were driving on a slippery surface. But as you said the much bigger issue is how fragile the...

You don't want brake Brake is something used in rc cars, where if you go straight into reverse it applies a brake instead of reverse. Without brake is good. I'm afraid you're not quite right on the braking. Braking on a brushed esc refers to what it does when the stick is centred (no movement), bra...

That's a pair of Pololu universal mounting hubs... http://www.hobbytronics.co.uk/motor-hub-3mm?keyword=Pololu%20hub I drilled out the 4 threaded holes in one of the hubs, and countersunk those holes. I then ran bolts through the drilled out hub, through the axe arm, and screwed them into the second ...

Really need a video of this guy in operation :D You're in luck... https://youtu.be/2Q1-1wDGhec I've added a comment on this video that's got timestamps for RBMK's fights (and my others) https://youtu.be/c_qfIdc_MSQ Jump to 43:40 on this one for a decent fight against Bulletproof (yay titanium spark...

The bigger/heavier blades will increase the turning and gyro forces which could make it difficult to control - but I'll dial back the acceleration/braking and maybe adjust the angle of the main blades so it should move much the same as before. I'm also going to add some kind of adjustment for the mo...

Believe it or not, the current version on RBMK was never supposed to be a competitive robot, it was entirely built to see if my weird gyro walker idea would actually work. I was delighted with it performance at Ant Freeze even though it didn't win a fight, so I was more surprised than anyone when it...